Halogenated pentenes



Patented Apr. '7, 1953 HALOGENATED PENTENES Robert I. Ruh and Arthur F. Gordon, Midland, Mich., assignors to Dow Corning Corporation, Midland, Mich., a corporation of Michigan No Drawing. Application December 26, 1951, Serial No. 263,497

2 Claims.

liquid anhydrous HF at a temperature from C. to 230 0. Under the above conditions the compound C5HC1TF2 having a boiling point of about C. at 1 mm. is obtained;

The above method may be carried out either at atmospheric pressure or at super-atmospheric pressure. Obviously when the temperature is above 19 C. it will be necessary to maintain pressure in the system in order to keep the HF in liquid state but otherwise the pressure is not critical.

The rate of the reaction will vary with the temperature. It is preferred that the reaction be carried out at temperatures from C. to 200 C.

After completion of the reaction, the product is separated by distillation.

The following example is illustrative only and 2 should not be construed as limiting the invention which is properly set forth in the appended claims.

Example 23.? gram mols of CCl2=CC1CCl2CHC1CCla Was heated with gram mols of HF in a nickelcopper autoclave at C. for 6 hours. The pressure was about 500 p. s. i. The product was then removed from the autoclave, washed with water until neutral and dried over anhydrous calcium sulfate. The material was distilled and there was obtained in 71 per cent yield the compound C5I-IC17F2 boiling at 80 C. at 1 mm. The material had a density at 25 C. of 1.7458 and a refractive index at 25 C. of 1.5099. c

That which is claimed is:

1. The method which comprises heating with liquid HF at a temperature of from 0 C. to 230 0. whereby Cal-IChFz is obtained.

2. A linear compound of the formula CsHCl'lFz having a boiling point of about 80 C. at 1 mm.

ROBERT P. RUH. ARTHUR F. GORDON.

No references cited. 

2. A LINEAR COMPOUND OF THE FORMULA C5HCL7F2 HAVING A BOILING POINT OF ABOUT 80*C. AT 1MM. 